MX9403219A - Metodo de union de tejas para tejado, para sustrato de tejado, que utiliza espuma de uretano. - Google Patents

Metodo de union de tejas para tejado, para sustrato de tejado, que utiliza espuma de uretano.

Info

Publication number
MX9403219A
MX9403219A MX9403219A MX9403219A MX9403219A MX 9403219 A MX9403219 A MX 9403219A MX 9403219 A MX9403219 A MX 9403219A MX 9403219 A MX9403219 A MX 9403219A MX 9403219 A MX9403219 A MX 9403219A
Authority
MX
Mexico
Prior art keywords
roof
bonding
foamable liquid
urethane foam
substrate utilizing
Prior art date
Application number
MX9403219A
Other languages
English (en)
Spanish (es)
Inventor
Pat L Murray
E Richard Huber
Thomas C Hughes
Original Assignee
Polyfoam Prod Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Polyfoam Prod Inc filed Critical Polyfoam Prod Inc
Publication of MX9403219A publication Critical patent/MX9403219A/es

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/76—Mixers with stream-impingement mixing head
    • B29B7/7663—Mixers with stream-impingement mixing head the mixing head having an outlet tube with a reciprocating plunger, e.g. with the jets impinging in the tube
    • B29B7/7678—Mixers with stream-impingement mixing head the mixing head having an outlet tube with a reciprocating plunger, e.g. with the jets impinging in the tube of the gun type, i.e. hand-held units
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
    • E04D1/29—Means for connecting or fastening adjacent roofing elements
    • E04D1/2907—Means for connecting or fastening adjacent roofing elements by interfitted sections
    • E04D1/2914—Means for connecting or fastening adjacent roofing elements by interfitted sections having fastening means or anchors at juncture of adjacent roofing elements
    • E04D1/2916—Means for connecting or fastening adjacent roofing elements by interfitted sections having fastening means or anchors at juncture of adjacent roofing elements the fastening means taking hold directly on adjacent elements of the same row
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
    • E04D1/34—Fastenings for attaching roof-covering elements to the supporting elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
    • E04D1/36—Devices for sealing the spaces or joints between roof-covering elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D15/00—Apparatus or tools for roof working
    • E04D15/02—Apparatus or tools for roof working for roof coverings comprising tiles, shingles, or like roofing elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
    • E04D1/34—Fastenings for attaching roof-covering elements to the supporting elements
    • E04D2001/3408—Fastenings for attaching roof-covering elements to the supporting elements characterised by the fastener type or material
    • E04D2001/3435—Adhesive, hardenable or heat-sensitive material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
    • E04D1/34—Fastenings for attaching roof-covering elements to the supporting elements
    • E04D2001/347—Fastenings for attaching roof-covering elements to the supporting elements characterised by the fastening pattern
    • E04D2001/3473—Fastenings for attaching roof-covering elements to the supporting elements characterised by the fastening pattern fastening single roof elements to the roof structure with or without indirect clamping of neighbouring roof covering elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
    • E04D1/34—Fastenings for attaching roof-covering elements to the supporting elements
    • E04D2001/3488—Fastenings for attaching roof-covering elements to the supporting elements characterised by the type of roof covering elements being fastened
    • E04D2001/3497—Spanish type tiles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1788—Work traversing type and/or means applying work to wall or static structure
    • Y10T156/179—Work traversing type and/or means applying work to wall or static structure with liquid applying means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1798—Surface bonding means and/or assemblymeans with work feeding or handling means with liquid adhesive or adhesive activator applying means

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Finishing Walls (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
  • Ceramic Products (AREA)
MX9403219A 1993-05-03 1994-05-02 Metodo de union de tejas para tejado, para sustrato de tejado, que utiliza espuma de uretano. MX9403219A (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/056,183 US5362342A (en) 1990-12-18 1993-05-03 Method of bonding roof tiles to roof substrate utilizing urethane foam

Publications (1)

Publication Number Publication Date
MX9403219A true MX9403219A (es) 1997-02-28

Family

ID=22002727

Family Applications (1)

Application Number Title Priority Date Filing Date
MX9403219A MX9403219A (es) 1993-05-03 1994-05-02 Metodo de union de tejas para tejado, para sustrato de tejado, que utiliza espuma de uretano.

Country Status (7)

Country Link
US (1) US5362342A (fr)
EP (1) EP0699131A4 (fr)
JP (1) JP3439477B2 (fr)
AU (1) AU674083B2 (fr)
MX (1) MX9403219A (fr)
NZ (1) NZ266344A (fr)
WO (1) WO1994025274A1 (fr)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6428738B1 (en) 1995-11-01 2002-08-06 Patent Holding Company Method of manufacturing an in-mold laminate component
US5895536A (en) * 1996-05-17 1999-04-20 Insta-Foam Products Method of adhering roof tiles using one-component adhesive and roof construction obtained thereby
US5694736A (en) * 1996-08-26 1997-12-09 Saether; Kolbjorn Method for securing a cladding plate to a building substrate
US5873702A (en) * 1997-06-20 1999-02-23 Siemens Westinghouse Power Corporation Apparatus and method for sealing gas turbine blade roots
US6130268A (en) * 1997-06-23 2000-10-10 Polyfoam Products, Inc. Two component polyurethane construction adhesive
US5951796A (en) * 1997-06-23 1999-09-14 Polyfoam Products, Inc. Two component polyurethane construction adhesive and method of using same
US6164021A (en) * 1998-02-06 2000-12-26 Polyfoam Products, Inc. Hip and ridge sealing and attachment system and method of using same
WO1999043906A1 (fr) * 1998-02-24 1999-09-02 Polyfoam Products, Inc. Systeme de toiture en pente et procede d'installation de ce dernier
US6082762A (en) 1998-05-22 2000-07-04 Larry J. Winget Air bag cover having a decorative applique preform bonded thereto and method of making same
US6620371B1 (en) * 1998-05-22 2003-09-16 Patent Holding Company Method of manufacturing an in-mold laminate component
US6206991B1 (en) 1999-05-24 2001-03-27 Fomo Products, Inc. Roof tile construction using sandwiched adhesive
US6305143B1 (en) 1999-06-25 2001-10-23 Ashland Inc. Composite roof structures prepared using one-part moisture curing polyurethane foaming adhesive compositions containing a reversibly blocked catalyst
EP1234924A1 (fr) * 2001-02-27 2002-08-28 Gambale Srl Tuile à double ondulation avec dispositifs de blocage
US7316099B2 (en) * 2001-11-15 2008-01-08 Polyfoam Products, Inc. Spaced sheathing roofing system and method of installing same
US7249443B2 (en) * 2001-11-15 2007-07-31 Polyfoam Products, Inc. Insulated pitched tile roofing system and method of installing same
DE10157286C1 (de) 2001-11-22 2003-05-08 Lafarge Roofing Components Material für die Herstellung von Verbindungen zwischen einem Dachstein und einem Firststein
WO2004079116A1 (fr) 2003-03-07 2004-09-16 Helmut Roitmair Procédé pour assembler des parpaings et réaliser une construction de parpaings, construction de parpaings
AT414333B (de) * 2003-03-07 2008-04-15 Roitmair Helmut Verfahren zum verbinden von bausteinen sowie bausteinverbund
US7182221B2 (en) * 2003-05-09 2007-02-27 Intellipack Dispensing system and method of manufacturing and using same with a dispenser tip management
US7552847B2 (en) * 2003-05-09 2009-06-30 Intellipack Dispenser mixing module and method of assembling and using same
FR2857042B1 (fr) * 2003-07-02 2005-11-04 Francois Curial Procede de realisation d'une toiture construite en tuiles canal et toiture obtenue.
US20050252140A1 (en) * 2004-05-14 2005-11-17 Faulkner David H Insulated pitched roof system and method of installing same
US7972688B2 (en) * 2005-02-01 2011-07-05 Letts John B High density polyurethane and polyisocyanurate construction boards and composite boards
GB2424426A (en) * 2005-03-22 2006-09-27 Lafarge Roofing Technical Centers Ltd Insulated roof system
US8728609B2 (en) * 2005-09-17 2014-05-20 Carlos Torres Roof tiles and roof tile structures and methods of making same
US8453390B2 (en) * 2007-01-30 2013-06-04 Firestone Building Products Company, Llc High density polyurethane and polyisocyanurate construction boards and composite boards
US20090266023A1 (en) * 2008-04-23 2009-10-29 Tat-On Man Adhesive projection points for roofing elements
US8186117B2 (en) * 2008-05-27 2012-05-29 Eren Tumer H System for creating a decking/flooring and a method for installing same
WO2009149049A2 (fr) * 2008-06-02 2009-12-10 3M Innovative Properties Company Procédé de fixation de tuile de toiture
EP2447433A1 (fr) * 2010-10-28 2012-05-02 Terraco Group sprl Élément de construction en terre crue
US8898978B2 (en) 2012-07-26 2014-12-02 Pat L. Murray Innovative batten system for roof tile installation
EP3625021A2 (fr) * 2017-03-25 2020-03-25 Baniecka, Iwona Procédé de fabrication d'un élément de construction pour isolation thermique, procédé de remplissage de cavité avec un matériau isolant dans un élément de construction et élément de construction pour isolation thermique
US10722909B1 (en) * 2018-11-01 2020-07-28 Paul Charles Waelder System and method of delivering reactive fluids to an applicator
CA3162792A1 (fr) * 2020-02-12 2021-08-19 Claudio Caselli Tuile de toit et couverture de toit
US11542710B2 (en) 2021-02-09 2023-01-03 Dal-Tile Corporation Roof tile and a roof covering

Family Cites Families (62)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3072582A (en) * 1955-10-20 1963-01-08 Gen Tire & Rubber Co Polyether-urethane foams and method of making same
US3122862A (en) * 1955-12-27 1964-03-03 Carroll C Figge Method of roofing
NL242359A (fr) * 1958-08-15
US3391093A (en) * 1959-04-01 1968-07-02 Gen Tire & Rubber Co Polyester-polyurethane foams and method of making same
GB935926A (en) * 1961-01-16 1963-09-04 Ici Ltd Process for the manufacture of polyurethane products
US3148104A (en) * 1961-01-30 1964-09-08 Rapp Harry Michael Roofing apparatus
US3240432A (en) * 1964-02-18 1966-03-15 Gerald L Boettler Apparatus for spraying resin
US3263928A (en) * 1964-11-19 1966-08-02 Frederick E Gusmer Apparatus for ejecting a mixture of liquids
US3291396A (en) * 1964-11-30 1966-12-13 Walter John Self-purging mixing and spraying apparatus
US3417923A (en) * 1966-11-04 1968-12-24 Ronald E. Carlson Spray gun for applying a two-component mixture
DE1759249B1 (de) * 1968-04-13 1971-08-26 Braas & Co Gmbh Verfahren zum Abdichten der Fugen zwischen Dacheindeckungsplatten
US3698972A (en) * 1968-08-14 1972-10-17 James Lenzner Method of sealing and insulating a roof construction
US3633795A (en) * 1969-12-16 1972-01-11 Insta Foam Prod Inc Foam dispenser
US3687370A (en) * 1971-01-18 1972-08-29 Instapak Corp Liquid mixing and dispensing apparatus
US3786990A (en) * 1972-07-17 1974-01-22 Graco Inc Plural component gun
CA988557A (en) * 1972-09-18 1976-05-04 Albert H. Moos Apparatus for and method of spraying plural component materials
US4036673A (en) * 1973-12-28 1977-07-19 Congoleum Corporation Method for installing surface covering or the like
US3876145A (en) * 1974-01-23 1975-04-08 Gusmer Corp Apparatus for ejecting a mixture of a plurality of liquids
US3941355A (en) * 1974-06-12 1976-03-02 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Mixing insert for foam dispensing apparatus
US3954544A (en) * 1974-06-20 1976-05-04 Thomas Hooker Foam applying apparatus
US3945569A (en) * 1974-10-25 1976-03-23 Instapak Corporation Foam dispensing apparatus
US4023733A (en) * 1974-10-25 1977-05-17 Instapak Corporation Foam dispensing apparatus
JPS539797B2 (fr) * 1975-02-21 1978-04-08
US4262848A (en) * 1977-12-12 1981-04-21 Chabria Paul R Gun for in situ formation of foam in packages
JPS54111598A (en) * 1978-02-21 1979-08-31 Bridgestone Corp Preparation of flame-retardant, low-smoking rigid polyurethane foam
US4263166A (en) * 1978-04-28 1981-04-21 Entek Corporation Spray foam insulation gun
US4244901A (en) * 1978-08-31 1981-01-13 Foamseal, Inc. Method of bonding structural support members to flat sheets
US4262847A (en) * 1979-01-02 1981-04-21 Witco Chemical Corporation Urethane foam gun
US4285446A (en) * 1979-06-22 1981-08-25 Ransburg Corporation Automatic purging system having a pressure sensor and a timing mechanism
US4325513A (en) * 1980-03-20 1982-04-20 Smith Robert L Gun for dispensing a plural component system
DE3012001A1 (de) * 1980-03-28 1981-10-08 Bayer Ag, 5090 Leverkusen Verfahren zur herstellung von polyetherpolyolen und deren verwendung in einem verfahren zur herstellung von starren polyurethanschaumstoffen
JPS57119915A (en) * 1981-01-16 1982-07-26 Bridgestone Corp Preparation of urethane modified isocyanurate foam
US4407982A (en) * 1981-02-06 1983-10-04 Du Pont Canada Inc. Process for the manufacture of foamed structures
US4399930A (en) * 1981-05-22 1983-08-23 Universal Foam Systems, Inc. Foam dispensing gun
US4377256A (en) * 1981-06-22 1983-03-22 Gusmer Corporation Apparatus for dispensing a mixture of mutually reactive liquids
US4568003A (en) * 1981-09-02 1986-02-04 Sealed Air Corporation Detachable mixing chamber for a fluid dispensing apparatus
US4469251A (en) * 1981-09-02 1984-09-04 Sealed Air Corporation Detachable mixing chamber for a fluid dispensing apparatus
US4440320A (en) * 1981-11-30 1984-04-03 Wernicke Steven A Foam dispensing apparatus
US4534802A (en) * 1982-03-03 1985-08-13 Olin Corporation Air purge/solvent bath method
US4429069A (en) * 1982-04-12 1984-01-31 Saytech, Inc. Flame retardant polyurethane composition
US4471887A (en) * 1982-04-26 1984-09-18 Component Management Corp. Dispensing device
DE3317194A1 (de) * 1983-05-11 1984-11-15 Henkel KGaA, 4000 Düsseldorf Polyurethan-prepolymere auf basis oleochemischer polyole, ihre herstellung und verwendung
ZA847314B (en) * 1983-09-19 1985-04-24 Fargo Chou Intergrated roofing structure
US4595711A (en) * 1984-06-20 1986-06-17 Stepan Company Aromatic polyester polyols fluorocarbon compatibilized with ethoxylate propoxylate compounds for urethane and isocyanurate foams
US4546122A (en) * 1984-08-06 1985-10-08 Mobay Chemical Corporation Flexible polyurethane foams
US4585807A (en) * 1985-01-14 1986-04-29 Basf Corporation Rigid polyurethane foams employing oxyalkylated ethylenediamine
US4993596A (en) * 1985-05-10 1991-02-19 Insta-Foam Products Inc. Mixing and dispensing gun with improved removal nozzle
US4636529A (en) * 1985-05-13 1987-01-13 Pennwalt Corporation Polyurethane foams from isocyanate, polyester polyol and chlorodifluoromethane
US4636425A (en) * 1985-06-10 1987-01-13 Foamseal, Inc. Urethane bonding method and laminate
US4713399A (en) * 1985-12-30 1987-12-15 The Dow Chemical Company Flexible polyurethane foams prepared from poly(alkylene carbonate) polyols
US4642319A (en) * 1986-01-22 1987-02-10 Texaco Inc. Modified terephthalic ester polyols and rigid foams therefrom
JPS62185773A (ja) * 1986-02-10 1987-08-14 Tokio Komagine 亜炭の粉末を主剤とする浸透性気泡状接着剤の製造法
DE3626223A1 (de) * 1986-08-02 1988-02-04 Henkel Kgaa Polyurethan-praepolymere auf basis oleochemischer polyole, ihre herstellung und verwendung
US4742089A (en) * 1987-08-12 1988-05-03 Hitachi, Ltd. Rigid polyurethane foam and process for producing the same
US4913317A (en) * 1988-09-14 1990-04-03 Foamtek, Inc. Foam dispensing apparatus
JPH02304165A (ja) * 1989-05-19 1990-12-17 Teihiyuu Kk 屋根葺パネルの成形方法及びその屋根葺パネル
US5032623A (en) * 1989-07-24 1991-07-16 Foam Supplies, Inc. Rigid foams using CHClF2 as a blowing agent
US5040728A (en) * 1990-02-26 1991-08-20 Olin Corporation Composite valving rod scraper device and cartridge
US4996812B1 (en) * 1990-02-20 1999-11-02 Carlisle Corp Method of membrane application in roof construction
US5163584A (en) * 1990-12-18 1992-11-17 Polyfoam Products, Inc. Method and apparatus for mixing and dispensing foam with injected low pressure gas
US5253461A (en) * 1990-12-21 1993-10-19 Tremco, Inc. Fastener-free roofing system and method
JPH05112770A (ja) * 1991-10-18 1993-05-07 Suzuka Toryo Kk 瓦固定用の接着材

Also Published As

Publication number Publication date
AU674083B2 (en) 1996-12-05
NZ266344A (en) 1996-09-25
WO1994025274A1 (fr) 1994-11-10
EP0699131A1 (fr) 1996-03-06
EP0699131A4 (fr) 1997-02-26
AU6780694A (en) 1994-11-21
US5362342A (en) 1994-11-08
JPH08509791A (ja) 1996-10-15
JP3439477B2 (ja) 2003-08-25

Similar Documents

Publication Publication Date Title
MX9403219A (es) Metodo de union de tejas para tejado, para sustrato de tejado, que utiliza espuma de uretano.
MY103312A (en) Method and device for forming, by spraying, a polyurethane layer on a surface
EP0361740A3 (fr) Panneau interne de véhicule
KR100186862B1 (en) Pressure sensitive adhesive laminate
GB2281231B (en) A method of manufacturing multilayer plasterboard and apparatus therefor
NZ336137A (en) A process for coating foam
AU3317789A (en) Polyurethane foam prepared using high functionality cell openers and process for preparing the same
ZA955309B (en) Method and device for the production of foam using carbon dioxide dissolved under pressure
SG102602A1 (en) Molding made from polyerethane and process for its production
EP0487948A3 (en) Method and device for placing surface channels in panels of soft material and use of the device
AU7924094A (en) Latex-like flexible polyurethane foam and process for making same
EP0418738A3 (fr) Article abrasif et son procédé de fabrication
TW334382B (en) A process and a device for the continuous production of block foam
DE3366325D1 (en) Aromatic amino polyols and rigid polyurethane and polyisocyanurate foams obtainable therefrom
IL130929A0 (en) Process and device for producing polyurethanes containing filling material
GB2168912B (en) Dual purpose foam generating and high pressure nozzle.
ES2148984T3 (es) Procedimiento para la preparacion de espumas rigidas de poliuretano.
EP0613933A3 (fr) Procédé pour préparer les surfaces de substrat en vue de collages et matière abrasive convenant à cet usage.
EP0361764A3 (fr) Composition contenant des composants contenant des hydrogènes réactifs à l'isocyanate
CS560687A2 (en) Method of organo-mineral foamy materials production
AU3403789A (en) Method for mixing isocyanate and polyhydric alcohol to form a mixture reaction to produce polyurethane
JPS649708A (en) Molding method for cushion body
GB8924110D0 (en) Apparatus and method for use in the manufacture of roof tiles
GB2278350B (en) Hydroxylated diglycerides and triglycerides,method of production thereof and use in the production of polyurethanes
AU4330389A (en) Effect of using chemical modifiers in the curing of polyurethane foams